heading stope

例句：

1. 1. The mine has a large heading stope that needs to be cleaned regularly.
   矿井有一个很大的井口，需要定期清理。
2. 2. The mining company is using advanced technology to improve the efficiency of their heading stopesystem.
   矿业公司正在使用先进技术来提高其井口系统的工作效率。
3. 3. The stope is filled with coal, and workers need to carefully remove it before moving on to thenext section.
   采煤工作面充满了煤炭，工人需要小心地移除它，然后才能继续到下一个部分。